dnnta

#import "NSArray+NullReplacement.h"
#import "NSDictionary+NullReplacement.h"

@implementation NSArray (NullReplacement)

- (NSArray *)arrayByReplacingNullsWithBlanks  {
    NSMutableArray *replaced = [self mutableCopy];
    const id nul = [NSNull null];
    const NSString *blank = @"";
    for (int idx = 0; idx < [replaced count]; idx++) {

dnnta

static NSInteger currentTopVisibleSection = -1;
 
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    NSIndexPath *topCellPath = [[tableView indexPathsForVisibleRows] objectAtIndex:0];
    if (currentTopVisibleSection != topCellPath.section) {
        currentTopVisibleSection = topCellPath.section;
        NSLog(@"current section on top is %d", currentTopVisibleSection);
    }
 
    NSString *header = [NSString stringWithFormat:@"Section %d", section];

dnnta

#import <Foundation/Foundation.h>

void method1(NSArray *numbers)
{
	NSArray *sorted = [numbers sortedArrayUsingSelector:@selector(compare:)];
}

void method2(NSArray *numbers)
{
	NSNumber *max=[numbers valueForKeyPath:@"@max.doubleValue"];

dnnta

//
//  UIView+Frame.h
//  
//
//  Created by xxxx on 14-5-28.
//  Copyright (c) 2014年 TBJ. All rights reserved.
//

#import <UIKit/UIKit.h>

dnnta

-(void)pauseLayer:(CALayer*)layer
{
    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];
    layer.speed = 0.0;
    layer.timeOffset = pausedTime;
}

-(void)resumeLayer:(CALayer*)layer
{
    CFTimeInterval pausedTime = [layer timeOffset];

dnnta

oracle: select * from table_name order by dbms_random.value

#扫描记录时给每条记录生成一个随机值，然后根据这个值进行排序
mssql: select top N * from table_name order by newid()

mysql: select * from table_name order by rand()
#mysql用随机值更新记录
update articles set views = rand()* 1000

sqlite3: select * from table_name order by random()

dnnta

#import "NSDate+Formatting.h"

#define SECONDS_PER_MINUTE 60.0
#define SECONDS_PER_HOUR   3600.0
#define SECONDS_PER_DAY    86400.0
#define SECONDS_PER_MONTH  2592000.0
#define SECONDS_PER_YEAR   31536000.0

@implementation NSDate (formatting)

dnnta

//
//  Config.h
//  ZanSe
//
//  Created by dnnta on 12-12-13.
//  Copyright (c) 2012年 NightWish. All rights reserved.
//

//
//  Config.h

dnnta

[UIColor colorWithRed:((float)((hex & 0xFF0000) >> 16))/255.0
                 green:((float)((hex & 0xFF00) >> 8))/255.0 
                  blue:((float)(hex & 0xFF))/255.0 alpha:1.0]

dnnta

/*
 *  graphic_util.h
 *  radikker
 *
 *  Created by saiten on 09/11/26.
 *  Copyright 2009 __MyCompanyName__. All rights reserved.
 *
 */

#ifndef __SYUN_GRAPHICS_H__